#include <unistd.h>
#include <stdio.h>

int main(void){
	printf("My real user ID is			%5ld\n", (long)getuid());
	printf("My effective user ID is		%5ld\n", (long)geteuid());
	printf("My real group ID is 		%5ld\n", (long)getgid());
	printf("My effective group ID is 	%5ld\n", (long)getegid());
	return 0;
}
